So why did we have to waste our time with those dumb robberies?

6 seconds sound clip from Batman (1966) - Hot Off the Griddle (S2E3) TV Series.

You can hear this line at 00:08:32 in the Blu-ray version of the movie.

Quote context

[...]

- Well, anything you say, Caped Crusader. Always glad to aid the Hooded Avenger.

- I appreciate that.

- Hey, why don't you and I have lunch together sometime, what do you say?

- Perhaps. Goodbye.

- See you around.

- You are the créme de la créme of Gotham City's cat burglars.

- So why did we have to waste our time with those dumb robberies?

- Unh! Never question my motives.

- Suffice it to say that 12 men applied for this job. All the others washed out when they were caught by the law.

- You proved your mettle when you escaped unscathed.

- I am in the process of selecting cat burglars for the greatest caper in crimedom's history.

[...]